528720100 has 18 divisors (see below), whose sum is σ = 1147322834. Its totient is φ = 211488000.

The previous prime is 528720089. The next prime is 528720109. The reversal of 528720100 is 1027825.

It can be written as a sum of positive squares in 3 ways, for example, as 72726784 + 455993316 = 8528^2 + 21354^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (528720109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2643501 + ... + 2643700.

Almost surely, 2^528720100 is an apocalyptic number.

528720100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

528720100 is an abundant number, since it is smaller than the sum of its proper divisors (618602734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

528720100 is a wasteful number, since it uses less digits than its factorization.

528720100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287215 (or 5287208 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 528720100 is about 22993.9144122961. The cubic root of 528720100 is about 808.6152736933.

Adding to 528720100 its reverse (1027825), we get a palindrome (529747925).

The spelling of 528720100 in words is "five hundred twenty-eight million, seven hundred twenty thousand, one hundred".